Chii chinonzi SCH (Nhamba Yechirongwa)?

SCH inomirira kuti “Schedule,” inova hurongwa hwemanhamba hunoshandiswa muAmerican Standard Pipe System kuratidza ukobvu hwemadziro. Inoshandiswa pamwe chete nedhayamita yezita (NPS) kupa yakajairwa madziro ukobvu sarudzo dzepombi dzehukuru hwakasiyana, kufambisa dhizaini, kugadzira, uye kusarudzwa.

 

SCH hairatidze zvakananga kukora kwemadziro asi igadziriso yegiredhi inoenderana nekukobvu kwemadziro kuburikidza nematafura akamisikidzwa (semuenzaniso, ASME B36.10M, B36.19M).

 

Mumatanho ekutanga ekukura kwakajairwa, fomula yekufungidzira yakatsanangurwa kurondedzera hukama pakati peSCH, kudzvanywa, uye simba rezvinhu:
SCH ≈ 1000 × P / S
Kupi:
P - Dhizaini kudzvanywa (psi)
S - Inobvumirwa kushushikana kwezvinhu (psi)

 

Kunyangwe iyi fomula inoratidza hukama pakati pemadziro ukobvu dhizaini uye mamiriro ekushandisa, mukusarudza chaiko, iwo anoenderana ukobvu hwemadziro hunokosha hunofanira kuramba huchitaurwa kubva kumatafura akajairwa.

 

Mavambo uye Hunoenderana Maitiro eSCH (Nhamba Yechirongwa)

Iyo SCH sisitimu yakavambwa neAmerican National Standards Institute (ANSI) uye yakazogamuchirwa neAmerican Society of Mechanical Engineers (ASME), yakabatanidzwa muB36 nhevedzano yezviyero, kuratidza hukama pakati pepombi madziro ukobvu uye pombi dhayamita.

 

Parizvino, mazinga anowanzoshandiswa anosanganisira:

ASME B36.10M:
Inoshanda kune kabhoni simbi uye alloy simbi mapaipi, anofukidza SCH 10, 20, 40, 80, 160, nezvimwewo;

ASME B36.19M:
Inoshanda kune mapaipi esimbi isina tsvina, kusanganisira yakareruka akatevedzana senge SCH 5S, 10S, 40S, nezvimwe.

 

Kuunzwa kwenhamba dzeSCH kwakagadzirisa nyaya yekumisikidzwa kwemudhuri wemadziro akasiyana akasiyana madhayamita, nekudaro kumisa dhizaini yepombi.

 

SCH (nhamba yehurongwa) inomiririrwa sei?

Muzviyero zveAmerica, mapaipi anowanzo kufananidzirwa kushandisa fomati "NPS + SCH," senge NPS 2" SCH 40, ichiratidza pombi ine dhayamita remainches maviri uye ukobvu hwemadziro hunoenderana neSCH 40 standard.

NPS: Saizi yemupombi yezita, yakayerwa mumainji, isiri iyo dhayamita chaiyo yekunze asi indasitiri-yakajairwa dimensional identifier. Semuenzaniso, iyo chaiyo yekunze dhayamita yeNPS 2" inenge 60.3 millimeters.

SCH: Giredhi rekukora kwemadziro, uko nhamba dzepamusoro dzinoratidza madziro akakora, zvichikonzera kusimba kwepombi yakakura uye kuramba.

Uchishandisa NPS 2" semuenzaniso, ukobvu hwemadziro enhamba dzeSCH dzakasiyana ndedzinotevera (mayuniti: mm):

SCH 10: 2.77 mm
SCH 40: 3.91 mm
SCH 80: 5.54 mm

 
【Chinyorwa Chakakosha】
- SCH inongova zita, kwete chiyero chakananga chemadziro;
- Mapombi ane zita rakafanana reSCH asi akasiyana maNPS saizi ane akasiyana madziro ukobvu;
- Iyo yakakwira iyo SCH chiyero, iyo yakakura madziro epombi uye yakakwirira iyo inoshanda yekumanikidza chiyero.